Every BMW rider I talked to on this trip had what I consider a major repair along the way (except for the Dakar 650, it was just shedding parts like a molting bird sheds feathers.) There were GS 800s with blown engines, bent rims, blown shocks, screwed up electronics, and an intake system that fell apart and got sucked into the engine.

they ALL had their bikes into a dealer at least once trying to get things fixed.

I've traveled 32.000 Km in the last year with my BMW G650GS (Argentina, Uruguay and Chile) with no issues to complain other than a bad battery. Even if it is a BMW you must give some maintenance. They are good but not undestructible.
Nice trip of yours, enjoy Argentina.